The connection of the brake shoe disc brake with lever transmission

 

(57) Abstract:

The invention relates to the braking devices of railway vehicles and relates to disk brakes. The connection of the brake Shoe disc brake with lever mechanism includes a rocker with two longitudinal pins and the transverse element of the hinge and plate with lugs for pivotally fastening the rocker. What's new is that in the eyes of their plate pins installed the balancer, one of the pivots on which the end face provided with a friction device, representing loaded by means of spring a couple of washers, one of which is connected to the lug plate and the other mounted on the tongue of the balance weight can be rotated with the latter with respect to the first washer, with hinged transverse element of the balancer is connected to the lever mechanism, the thorn which has more friction device representing loaded by a spring relative to the balancer washer. The technical result is to simplify the design and increase its reliability. 1 C.p. f-crystals, 9 Il.

The invention relates to the braking devices of railway vehicles and touches the disk is initiated, The motor cycle", Moscow, 1960, page 123), which was used in the construction of trucks rail vehicles produced at the Kalinin carriage works, consisting of fixed on the axis of the wheelset brake disc mounted on the beam brake cylinder with dual levers and brake shoes with lining, primalsense to the brake disc on both sides.

Design of disc brakes on these trucks do not allow the brake pads to compensate for the movement of the disc that occurs when turning the wheel pairs along the path, and when the lateral motion of the bogie frame. In Fig. 1 is a diagram of the pressure of the brake linings when the coincidence of the axes of the disk 1 and the lining 2. In Fig. 2 is a diagram of the pressing plates when turning the wheel pair or lateral motion of the bogie frame. In Fig.2 shows that the disk 1 takes a moment M = P r (where, P is power; r is the radius), which leads to overloading of parts of the brake and drive, uneven wear of the friction surfaces of the brake linings 2.

The same shortcoming have disc brakes, described in the following literature:

1. C. I. Krylov, Century, Century Wings. Automatic brakes rolling stock, ed. M.: Transport, 1983, page 218;

2. Century, INOS the th rolling stock, M., 1979, page 311.

The closest technical solution adopted for the prototype) in relation to the claimed design is the design of the brake linkage for disk brakes of rail vehicles (patent GDR N 134440, 61 H 5/00, publ. 28.02.79), is designed so that a mounting plate holder brake friction pads 1 are the stiffening elements 2, which are expanding in the center of the fixing roller 4, which connects the mounting plate 1 with the brake lever mechanism 6 by means of the balancer 5.

Special design shape hanging holder brake friction lining helps to balance the downward position, which occurs when turning the wheel pair in the cart or in the frame of the car.

However, this design has five joints. This is clearly shown in the diagram (Fig. 3), where it is seen that lever transmission 6 through its hinges connected with the walking beam 5, which by means of its Central hinge is connected with the platen 4, and the latter, in turn, is connected by two hinges with mounting plate 1. The presence of five joints reduces the reliability of the design.

In addition, in this design there are no cell battery (included) which will touch the brake disk.

The objective of the proposed technical solution is to simplify the design and increase its reliability.

For this proposed connection of the brake Shoe disc brake with lever mechanism includes a rocker with two longitudinal pins and the transverse element of the hinge plate with lugs for pivotally fastening the rocker. What's new is that in the eyes of their plate pins installed the balancer, one of the pivots on which the end face provided with a friction device, representing loaded by means of spring a couple of washers, one of which is connected to the lug plate and the other mounted on the tongue of the balance weight can be rotated with the latter with respect to the first washer, with hinged transverse element of the balancer is connected to the lever mechanism, the thorn which has more friction device representing loaded by a spring relative to the balancer washer.

Washer is installed between the load arm and the lug plate and provided with a groove for accommodating studs, connecting it with the lug plate, and between the washer and the plate there is a gap.

The technical result is the following.

animago cross member directly to the rigging, reduces the number of joints in the structure (see Fig.9) and, thus, increase its reliability.

The presence of friction devices on the axle of the rocker and the thorn linkage allows locking plate respectively in vertical and horizontal planes.

The one of the friction devices in the form of loaded by the springs of the pair of washers, one of which is connected to the lug plate and the other mounted on the tongue of the balance weight can be rotated with the latter with respect to the first washer allows you to create a normalized value of the friction force between the plate and balancer and with the misalignment of the axes of the disk and plate enables the latter to turn on the thorns of a stabilizer.

The execution of the other friction device in the form of washers, loaded by a spring installed between the rocker and lever mechanism allows you to create the normalized magnitude of the friction force between the rocker lever and the transmission.

The ability to rotate the plate on the spikes of the balancer, and the hinge element of the balancer lever on the transmission, allows her to snuggle up to the brake disk, the entire surface friction.

The normalized value is to guard uniform gap between the surface of the friction disc and plate, to avoid touching the boot disk when the brake is released.

In Fig. 4 shows a top view of the connection node of the brake Shoe disc brake with lever mechanism of Fig. 5 - the same, left side view, and Fig. 6 - section a-a in Fig.4; Fig. 7 - section b-B in Fig.4; Fig. 8 is a view along arrow "B" in Fig.7; Fig. 9 - kinematic scheme.

The connection of the brake Shoe disc brake with lever mechanism includes a Shoe, a plate 1 with brake pads, rocker 2 pins 3,4, mounted in the lugs 5 of the plate 1, the lever transmission 6 is connected to the collector head 2 through its transverse hinge element 7, and the friction device 8,9 securing the Shoe in the deviant position and allowing him to snuggle up to the friction surface of the disc during braking, when the angle of rotation of the wheelset relative to the bogie frame. The friction device 8, the locking Shoe in a vertical plane, placed at the end of the 10 pin 3 of the walking beam 2 and consists of a washer 11 and a groove 12 that is installed between the rocker 2 and the ring 5 plate 1 and connected with the latter by means of studs 13, between the washer 11 and the plate 1 there is a gap. The washer 11 is able to rotate together with the relics of the disc springs 16 and nuts 17. The spring 16 serves to provide a constant effort of pressing a couple of washers 11 and 15. The washer 15 is attached to the tongue 14 of the collector head 2 without the possibility of rotation relative to it, but with the rocker 2 it can rotate relative to the washer 11.

The friction device 9, the locking Shoe in a horizontal plane placed on the tongue 18 linkage 6 and consists of a washer 19 having the ability to move along the axis of the linkage 6, but unable to rotate around this axis. Using Belleville springs 20 and nut 21 and washer 19 is pressed against the rocker 2, creating friction.

Design works as follows.

With the misalignment of the axes of the linkage and drive (Fig.2) and the touch pads of the disk, the resulting moment M = P r rotates the shoes in the hinges, overcoming the normalized friction between the washer 19 and the collector head 2 (Fig.6), and between the washers 11 and 15. It provides full pressure of the friction surface of the Shoe to the friction surface of the disc.

During retraction of boots from disk friction device 8,9 hold the Shoe in position specified when you boot to the disk.

1. The connection of the brake Shoe disc brake with lever transmission is Mirnogo fixing the balancer, characterized in that the lugs of the plates of its pins installed the balancer, one of the pivots on which the end face provided with a friction device, representing loaded by means of spring a couple of washers, one of which is connected to the lug plate and the other mounted on the tongue of the balance weight can be rotated with the latter with respect to the first washer, with hinged transverse element of the balancer is connected to the lever mechanism, the thorn which has more friction device representing loaded by a spring relative to the balancer washer.

2. Connection on p. 1, characterized in that the washer is installed between the load arm and the lug plate and provided with a groove for accommodating studs, connecting it with the lug plate, and between the washer and the plate there is a gap.

 

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